Section A - Rack Installation; General - Cisco D9054 Installation And Operation Manual

General

Introduction
The encoder is supplied with two power supplies that provide redundant power
with no single point of failure. Normal typical operation requires both supplies to
be powered up and switched on. Each power supply should be powered from a
separate mains branch circuit, in order to ensure redundancy.
The DC outputs from both power supplies are combined together in a current-
sharing scheme so that the total load is shared.
Power Connection
To operate the encoder, you must connect it to an AC power source. For
information about connecting the chassis to AC power, see Appendix A - Technical
Specifications.
As Cisco units are designed for 24 hours' operation, some products do not have a
power switch. In this case the mains cord and/or DC power supply cable serve(s) as
the mains disconnect device.
WARNING:
Make sure that at least one end of the power cable(s) remains easily accessible
for unplugging, if you need to switch off the unit. For example: Ensure that the
socket outlet is installed near the product.
WARNING:
To avoid electrical shock, connect the three-prong plug on this product to an
earth-grounded three-pin socket outlet only.
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Section A - Rack Installation

D9054 HDTV Encoder Intstallation and Operation Guide 4038938 Rev A